反应详情

The A isomer of 1-[2-(3,4-dihydro-1(2H)-benzopyran-4-yl)ethyl]-4-(3,4-dimethoxyphenyl)piperazine dihydrochloride is prepared by following the procedure of Example 1 but starting with the A isomer of 4-(2-bromoethyl -3,4-dihydro-(2H)-benzopyran (0.86 g), 1-(3,4-dimethoxyphenyl)piperazine dihydrochloride (1.10 g) and then dry potassium carbonate (1.38 g) and potassium iodide (0.6 g) in 2-butanone (15 cc).